Bichromatic UV detection system for atomically-resolved imaging of ions

Abstract

We present a compact and bichromatic imaging system, located outside of the vacuum chamber of a trapped ion apparatus, that collects the fluorescence of 230.6 nm and 369.5 nm photons simultaneously on a shared EMCCD camera. The system contains two lens doublets, consisting of a sphere and an asphere. It provides a numerical aperture of 0.45 and 0.40 at 230.6 nm and 369.5 nm, respectively, and enables spatially resolved state detection with a large field of view of 300 $\mu$m for long ${}^{115}$In${}^{+}$/${}^{172}$Yb${}^{+}$ Coulomb crystals. Instead of diffraction limited imaging for one wavelength, the focus in this system is on simultaneous single-ion resolved imaging of both species over a large field with special attention to the deep UV wavelength (230.6 nm) and the low scattering rate of In${}^{+}$ ions. The introduced concept is applicable to other dual-species applications.

References in corpus (4)

• A single ion coupled to an optical fiber cavity
• Enhanced Quantum Interface with Collective Ion-Cavity Coupling
• Ultra-low vibration closed-cycle cryogenic surface-electrode ion trap apparatus
• Design of a novel monolithic parabolic-mirror ion-trap to precisely align the RF null point with the optical focus

Cited by in corpus (2)

• ${}^{115}$In${}^{+}$-${}^{172}$Yb${}^{+}$ Coulomb crystal clock with $2.5\times 10^{-18}$ systematic uncertainty
• Cold highly charged ions in a radio-frequency trap with superconducting magnetic shielding